Improvement in boiler-feed-water regulators



. exact description thereof.

,timidi gitana JOHN s. BARDEnoF rn'ovinnncn, RHODE ISLAND.

Letters Patent No.. 94,937, dated September 2K1, 1869.

IMPROVEMENT IN'. '.BOILER-FEED-WATER IBEG'U'LATORS.

The Schedule referred to in these LettersV Patent and making part of the same To all whom 'it may conce/rn:

ism.

My invention is more especially intended to regulate the supply of water tosteanl-boilers, though capable of beingused for other purposes, and consistsV in the employment ot' a certain 'mechanism which shall at all times automatically'furnish to the pump such a quantity of water as may be necessary to keep the boiler filled to its proper level.

A is a cylindrical. vessel, which is placed at any point between the supply-tank and pump, and connected with both by pipes at G and F respectively;

The vessel A is also connected with the boiler at Water-level, by a pipe entering the same at E.

.O is a rod attached to the centre of the top, and extending downward, upon which the tube D slides.

The tube D is provided' with a shoulder, a, between which. and the nut b the air-chamber B is firmly held. The tube D is connected with the hell-crank lever K, by the link H, so that as it moves upon the rod C itmay at all times retain its perpendicular position.

The bell-crank lever K is connected, by the rod L, with the piston N, which moves in the cylinder O, attached tothe inside and bottom of the vessel A.

.lhc cylinder O is connected with the tube B upon the bottom and outside ofthe vessel A, by ports M and M', the other end of the piston N being connected with the bell-crank lever K', having upon its long arma balance-weight, R, corresponding to theweight ofthe air-chamber B, so that the said air-chamber 'may con` stant-ly'rest upon the surface of the water.

Oommencing with the various part's occupying the position shown. in the drawings, the operation of my invention is as follows:

The water from. the supply-tank enters the tube P at the point G, passes up through the port M-and down through the port M', and from thence to the pump, which force'sit into the boiler.

. The piston N being of much less diameter in` the centre than at either end, allows the water to follow the course indicated by the arrows.

The water is now pumped into the boiler until it reaches the pipe ,which is'connected with the vessel l A at the point E, above which the water does not rise, but as itis pumped inV passes from the boiler into and iills the vessel A, to the bottom of the airchamber B.

As the water continues to rise the' chamber B will be carried upward by its pressure, and the tube D, slidingl upoli bell-crank lever K, (which is attached to theside of the vessel A, as is also the lever K,) which causes the piston N, through the short arm and rod L, to

gradually movev forward as the water continues to flow in and raise the air-chamber B.

The port M soon becomes closed, and the Water from the supply-tank shut off from the pump, and consequently from the boiler, this 4movement continuing until the parts occupy the position shown bythe red lines.

The port M is now alone connected with the in= terior of the vessel A, and the water in the vessel A passes through the port M to the pump.

The air-chamber B gradually .moves downward as the water recedes, until the piston N is drawn back by the mechanism before described, and the port M is again open, andthe water permitted to flow from the tank to the pump, when the saine operation is repeated.

What I claim as vmy invention,'and desire to secure by LettersPatent, is-` I l. The combination of the chamber B, tube D, link H, bell-crank lever K, rod L, and-piston N, the whole constructed and arranged Vsubstantially as described. 2. The combination of the weight R, bell-crank lever K', rod -L, and pist-on N, the whole constructed and arranged substantially as described.

' 3. lhe combination ofthe cylinder O, piston N, in connection with the ports M and M', and tube P, the whole constructed and arranged substantially as described. n

J CHN-S. BARDEN.

. Witnesses:

W. B. VINCENT, JOHN D'. W. TAYLOR.

aient wir.

thel rod G, draws up the long arm ofthe 

